Aphiochaeta. 355 



strongly brownish tinged, veins brown, thin veins somewhat strong; 

 costa reaching nearly to the middle, costal divisions about as 14 — 7 — 4; 

 angle at fork somewhat acute; costal cilia moderately long; fourth 

 vein evenly curved. Halteres black. 



Female. Unknown. 



Length 2 to fully 2 mm. 



This species locates itself together with frontalis in one group, 

 and therefore the female will, I think, not be difficult to identify. 



A. melaena is rare, only two specimens, both males, have been 

 taken, Geel Skov ^Vi and '74 1919 (Th. Mortensen, the] author); 

 one of the specimens was taken on a fresh stub of Acer. 



Geographical distribution: — Hitherto only known from Den- 

 mark. 



103. A. infraposita Wood. 



1909. Wood, Ent. Month. Mag. 2, XX, 119, 147, c? et 1912. 1. c. 2, XXIII, 

 169, $ (Phora). — 1914. Brues, BuU. Wisc. Nat. Hist. Soc. XII, 121. 



Male. Frons not broader than high, greyish black, dullish; inner 

 bristle of lower row much below the outer, quite or nearly vertically 

 below it and placed near the eye-margin; supraantennal bristles 

 large and equal, the upper widely distant, more distant than the inner 

 bristles of middle row, the lower rather more approximate. Antennæ 

 not large, brownish black, arista short-pubescent. Palpi pale yellow, 

 of ordinary size and armature. Thorax black or brownish, very slightly 

 shining, humeri and the side margin more or less reddish; it has pale 

 brown or yellowish pubescence. Pleura more or less brownish, especi- 

 ally anteriorly and below. Mesopleura bare. Abdomen black, a little 

 greyish, dull, the very short hairs a little more visible at the hind mar- 

 gins of the segments and at the sides and increasing a little in length 

 behind. Hypopygium somewhat small, greyish, with short hairs below 

 on the sides; there is a yellowish ventral plate; anal tube not large, 

 but stout, yellow, with well developed apical hairs. Legs yellowish, 

 hind femora slightly darkened at apex, they are somewhat dilated, 

 with sparse, longish hairs below the basal half ; bristles on hind tibiæ 

 strong and also the posterodorsal bristles on middle tibiæ somewhat 

 large. Wings yellowish to brownish tinged, veins brown, thin veins 

 somewhat strong; costa reaching to the middle, the costal divisions 

 about as 12 — 8 — 5, thus 1 about equal to 2 + 3; costal cilia long, but 

 not specially long; fourth vein slightly curved in the basal part, for 

 the rest straight, but a little recurved at apex. Halteres yellow. 



23* 



